To obtain the outlet temperature of combustor,a kind of high-temperature and water cooling thermocouple was designed.The main factors affecting the results of thermocouple measurement were analyzed after numerical sim...To obtain the outlet temperature of combustor,a kind of high-temperature and water cooling thermocouple was designed.The main factors affecting the results of thermocouple measurement were analyzed after numerical simulation.Results showed that the high-temperature water cooling thermocouple can achieve high temperature measurement under the condition of 2 400 K.With the increase of the distance between the water cooling structure and the stagnation cover,the temperature measurement result was more accurate,and the increase in the area ratio of the inlet and outlet of the stagnation cover within a reasonable range can make the measurement results more accurate.The surface emissivity of the measuring point had a great influence on the radiation error.The pressure and flow rate of cooling water can be effectively reduced after adding zirconia coating onto the surface of the rake body.展开更多
Water temperature not only affects the solubility of gas in water but can also be an important factor in the dissipation process of supersaturated total dissolved gas （TDG）. The quantitative relationship between the...Water temperature not only affects the solubility of gas in water but can also be an important factor in the dissipation process of supersaturated total dissolved gas （TDG）. The quantitative relationship between the dissipation process and temperature has not been previously described. This relationship affects the accurate evaluation of the dissipation process and the subsequent biological effects. This article experimentally investigates the impact of temperature on supersaturated TDG dissipation in static and turbulent conditions. The results show that the supersaturated TDG dissipation coefficient increases with the temperature and turbulence intensity. The quantitative relationship was verified by straight flume experiments. This study enhances our understanding of the dissipation of supersaturated TDG. Furthermore, it provides a scientific foundation for the accurate prediction of the dissipation process of supersaturated TDG in the downstream area and the negative imp）acts of high dam projects on aquatic ecosystems.展开更多
The analysis of '09.08.19' regional rainstorm weather in Shenyang showed that the circulation situation of the rainfall was the typical subtropical high pressure with westerly trough.Surface cyclone developmen...The analysis of '09.08.19' regional rainstorm weather in Shenyang showed that the circulation situation of the rainfall was the typical subtropical high pressure with westerly trough.Surface cyclone development in cooperation with the convergence and the role of the front of the uplift produced by the heavy rains trigger mechanism.The coupling configuration of low-level jet created favorable conditions for the development of convection,while the two rapids provided a steady stream of water vapor transport for the heavy rainfall.K exponential distribution,500 hPa,700 hPa temperature field and the total pseudo-equivalent potential temperature for the precipitation forecasts have a certain direction meaning.Japan fax map and MM5 grasped the precipitation forecasts better.展开更多
[Objective]The study aimed to analyze the release of total phosphorous from Wensi Lake sediment into water.[Method]Though simulation experiments in a laboratory,we studied the effects of various environmental factors ...[Objective]The study aimed to analyze the release of total phosphorous from Wensi Lake sediment into water.[Method]Though simulation experiments in a laboratory,we studied the effects of various environmental factors like water-soil ratio,water temperature,pH,disturbance and dissolved oxygen（DO） on TP release from Wensi Lake sediment.[Result]The higher the water-soil ratio,the less TP released from the sediment;temperature increase sped up TP release from the sediment;when pH of overlying water was 6,the amount of released TP was the lowest;disturbing the overlying water accelerate TP release from the sediment;the lower the DO content,the larger the released TP.[Conclusion]The research could provide scientific references for controlling the pollution of Wensi Lake.展开更多
基金National Natural Science Foundation(9174110013) Aviation Power Fund(614B090310)
文摘To obtain the outlet temperature of combustor,a kind of high-temperature and water cooling thermocouple was designed.The main factors affecting the results of thermocouple measurement were analyzed after numerical simulation.Results showed that the high-temperature water cooling thermocouple can achieve high temperature measurement under the condition of 2 400 K.With the increase of the distance between the water cooling structure and the stagnation cover,the temperature measurement result was more accurate,and the increase in the area ratio of the inlet and outlet of the stagnation cover within a reasonable range can make the measurement results more accurate.The surface emissivity of the measuring point had a great influence on the radiation error.The pressure and flow rate of cooling water can be effectively reduced after adding zirconia coating onto the surface of the rake body.
基金supported by the National Natural Science Foundation of China (No.51279115)
文摘Water temperature not only affects the solubility of gas in water but can also be an important factor in the dissipation process of supersaturated total dissolved gas （TDG）. The quantitative relationship between the dissipation process and temperature has not been previously described. This relationship affects the accurate evaluation of the dissipation process and the subsequent biological effects. This article experimentally investigates the impact of temperature on supersaturated TDG dissipation in static and turbulent conditions. The results show that the supersaturated TDG dissipation coefficient increases with the temperature and turbulence intensity. The quantitative relationship was verified by straight flume experiments. This study enhances our understanding of the dissipation of supersaturated TDG. Furthermore, it provides a scientific foundation for the accurate prediction of the dissipation process of supersaturated TDG in the downstream area and the negative imp）acts of high dam projects on aquatic ecosystems.
文摘The analysis of '09.08.19' regional rainstorm weather in Shenyang showed that the circulation situation of the rainfall was the typical subtropical high pressure with westerly trough.Surface cyclone development in cooperation with the convergence and the role of the front of the uplift produced by the heavy rains trigger mechanism.The coupling configuration of low-level jet created favorable conditions for the development of convection,while the two rapids provided a steady stream of water vapor transport for the heavy rainfall.K exponential distribution,500 hPa,700 hPa temperature field and the total pseudo-equivalent potential temperature for the precipitation forecasts have a certain direction meaning.Japan fax map and MM5 grasped the precipitation forecasts better.
文摘[Objective]The study aimed to analyze the release of total phosphorous from Wensi Lake sediment into water.[Method]Though simulation experiments in a laboratory,we studied the effects of various environmental factors like water-soil ratio,water temperature,pH,disturbance and dissolved oxygen（DO） on TP release from Wensi Lake sediment.[Result]The higher the water-soil ratio,the less TP released from the sediment;temperature increase sped up TP release from the sediment;when pH of overlying water was 6,the amount of released TP was the lowest;disturbing the overlying water accelerate TP release from the sediment;the lower the DO content,the larger the released TP.[Conclusion]The research could provide scientific references for controlling the pollution of Wensi Lake.
